Yamaha YST-SW45, Service Manual, Page: 9 / 13

A
1
2
3
4
5
6
7
8
9
B C D E F G H I J K L
YST-SW45
BC
E
BC
E
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SD1913
2SB1274 2SK304 2SC4688 D3SBA20 S1NB20 2SC1815
2SA1015
2SC2240
E
C B
–
+
~
~
~
+
~
–
1SS133
MTZ15C
MTZJ24B
MTZJ12C µPC4570HA
Anode
Cathode
1
9
M51848L NJM78L08A
STK4036-2
1
8
NJM4558L
1
8
OUT
COM
IN
1
15
S
G D
0
0
0
0
0
0
14.4
14.2
0
0
0
0
0
0
0
0 0 0
0 0 0
14.4
-14.2
-0.4
-0.4
0 35.9
1.2
0
36.7
-36.8
-1.3
-1.3
-35.7
-34.5
14.4
0
0
0
0
0
0
0
0
0
0
0
0 0
0
0
-14.2
-1.8
14.4
-14.2
0
0
0
0
0
0
0
0 0 0
2.0
6.1
6.6
0
0.8 2.2
3.1
14.4
0.2
0.2
-14.2
0.8 25.4
32.5 14.4
14.9
0
-14.7
-14.2 -32.7
6.6 6.0
36.7 -36.8
AC57.4
AC12.2
0
12.7
12.7
1.9
1.9
0.7
0
0
12.7 7.9
0
0
0
0
3.9
7.9
6.7
6.6
3.9
1.4
7.3
0
1.4
6.6
7.9 5.3 7.9
7.3
0
0
0
-13.9
0
0
0
14.2
0
1.8
H
All v oltage are measured with a 10M
W
/V DC electric volt meter.
H
Components ha ving special characteristics are marked
s
and must be replaced
with parts having specifications equal to those originally installed.
H Schematic diag ram is subject to change without notice.
8
SCHEMATIC DIAGRAM